These are technical terms.
Intercropping: planting more than two crops at intervals according to a certain number of rows on a piece of land at the same time. This cultivation method is called intercropping. The interplanting two species have a long growth period. Intercropping is often between tall crops and short crops, such as corn intercropping with soybeans or vegetables. Intercropping can closely plant tall crops and make full use of marginal effect to obtain high yield, while short crops are less affected. On the whole, due to good ventilation and light transmission, light energy and CO2 can be fully utilized, and the yield can be increased by about 2%. Among them, the fewer rows of high crops and the more rows of short crops, the better the intercropping effect.
intercropping: two or more crops grow in the field at the same time for a part of their life cycle, that is, sow another crop before the previous crop matures.
mixed cropping: a planting method in which two or more crops with similar growing seasons are mixed and planted in the same field according to a certain proportion. Do not branch more, or mix them in the same industry or order them between plants. Mixed cropping can improve the utilization rate of light energy and land through the proper combination of different crops. When selecting crop combinations with drought and flood resistance, barren resistance and strong resistance, it can also reduce the impact of natural disasters and pests and diseases, and achieve stable production and guaranteed harvest. It has a history of more than 2, years in China. Grain and oil crops are widely used in dry land in the north, such as wheat and pea mixed cropping, sorghum and black beans mixed cropping, soybean and sesame mixed cropping, cotton and sesame or beans mixed cropping. However, due to the contradiction of competing for light, water and fertilizer among crop groups, and inconvenient field management, mixed cropping is not suitable for high-yield cultivation, so the area of this planting method has gradually decreased in recent years.
continuous cropping: a planting method in which the same crop is continuously planted in the same field within one year or year after year. Under certain conditions, continuous cropping is conducive to making full use of natural resources such as climate and soil in one place and planting a large number of ecologically adaptive crops with high economic benefits. Through continuous planting, it is easier for producers to master the cultivation techniques of a particular crop. However, continuous cropping will often cause many disadvantages: ① It will aggravate the breeding of pathogenic microorganisms, pests and parasitic and accompanying weeds that have specific harm to crops. For example, potato black spot disease, root rot of broad bean, watermelon vine cutting disease and the breeding of peanut nematode, soybean dodder, sunflower row and barnyard grass are all related to continuous cropping; (2) affecting the physical and chemical properties of soil and reducing fertilizer efficiency; (3) accelerate the consumption of some nutrients, resulting in nutrient loss; ④ Some toxic root exudates are accumulated in the soil, which leads to the "poisoning" of continuous cropping crops. Different crops have different reactions after continuous cropping. Generally, crops of Gramineae, Cruciferae and Liliaceae are more resistant to continuous cropping; Crops of Leguminosae, Compositae and Cucurbitaceae are intolerant of continuous cropping.
What can I do? 3 words
What can I do? 3 words: I can cook. When I cooked for the first time, all the dishes were burnt. Grandpa ate my cooking and threw up. Grandpa said, "You are ten years old and you can't cook. From today on, you can learn to cook with me. If you can't cook, what will you eat when I am not at home?" Grandpa said that we started cooking.
learn to fry cabbage first.
I washed the cabbage, so I watched Grandpa fry it once. Grandpa finished, and now it's my turn. I cut the cabbage into pieces, then poured the oil into the pot, and then lit it. I'll see if the oil is hot. When the oil is hot, I'll pour it into the pot, stir fry it with a shovel, add a little salt and water, and then I'll see if it's cooked. If it's cooked, I'll put it in.
Grandpa tasted it and said, "Not bad. Make more in the future, and you will make it more and more delicious.
"I will go home from school every day, cooking and cooking, and do this every day, because it will make grandpa do less work and let him not worry about me when he is not at home.
my cooking is getting more and more delicious. Today, when the teacher assigned homework, he asked every student to make a "small production" at home on weekends. When I got home, I began to think about what to do. Suddenly I saw an empty mineral water bottle on the opposite table, so I had a brainwave and thought, can I turn this bottle into a vase for arranging flowers? So I told my father the idea, and my father agreed and said it was a good idea.
first, he helped me cut off the mouth of the empty bottle with scissors, and then he gave it to me to do.
The first thing I did after I took the scissors was to cut the top half of the bottle into a belt about one centimeter wide in the vertical direction, and then roll the plastic strips outward into spiral petals by hand, and then beautify the bottom half of the bottle.
Stick beautiful patterns cut from New Year pictures on the bottle.
I'm going to start making flowers. I'm going to make a flower core with plastic paper first, and then insert a long plastic tube in the middle of the flower core. I draw two petals on white paper first, then paint the petals with my favorite color and stick them next to the flower core, then cut them into leaves with green gold paper and stick them under the flowers, and then repeat the previous method to make flowers with different colors. I'll * *. Finally, the flowers are made into vases first, and such a small production-vase is completed.
This small production looks simple, but it is really not easy to do. I spent more than three hours before and after.
In this way, a beautiful vase has finished writing 3 words, and it is free to
(1) The sunset is like a dream, and the sunset is falling on the edge of the dream.
There is a faint bright purple in the faint charming red, which renders a beautiful charm and looks forward to the clouds and rolling mountains all over the sky.
fell into a colorful dream.
Sunset is a full watercolor pen, which is lovingly waved on the cheek of the cloud.
clouds, burning up, gorgeous.
light red is covered with purples, and deep red is printed with purples.
it's rolling and soaring.
at the edge, it is bright and remarkably smart; In the middle, it is particularly dignified and full of affection.
Nearby, the layers are overlapping, which is false and real, such as heavy ink and heavy colors on rice paper.
in the distance, it is like strips of colored silk, elegant and hazy.
The silent mountain was lit, and the outline gradually became clear.
The continuous peaks burn orange, which is comparable to the clouds in the sky.
in the middle of the mountain, there is a faint blue in the purple, which is very heavy.
The dreamy pale pink cloud at the foot of the mountain blurs a dreamy forest and creates a poetic cottage.
(2) Dating with snow holds up a flower umbrella, and walking on a long road covered with snow, watching the flying snow fluttering. At first, it seemed that it was still a very ordinary encounter with her, and I didn't think much. I took a palm of snowflake in my hand, and the coolness seeped into my heart. "Snow falls silently only for cold"? A moist feeling that seems to have been stored for a long time comes to mind. Is the snow really silent? Simply put away my umbrella, and suddenly I feel that snowflakes seem to have spirituality. I can't help but rotate for a week. Now I really hope to understand their whispers and their feelings.
what are they talking about? Think of snow as the messenger of spring, "winter is not far from spring". Are they whispering the message of spring? Remembering that snow is an ancient poem, "There is no snow without spirit, and there is snow without poetry." Is she calling for inspiration? Oh, snow is audible, she announces the message of spring, and she walks lightly with ancient steps; She is great and completely buries all filth; She is selfless, turning herself into a quilt, so that the wheat seedlings can survive the winter safely; She is smart, and different feelings endow her with different spirituality. In the thinking of "is like a spring gale, come up in the night, blowing open the petals of ten thousand pear trees", Cher * * flies through time and space, and will fly further away. (3) The fairy tale autumn rain that blooms in autumn hits the phoenix tree, dribs and drabs, and the tall buildings are eager for dusk; The autumn moon reflects the soul of the river, echoing back and forth, and the moonlight soaks into the water.
-the inscription suddenly began to miss autumn.
the autumn wind, the leaves of the pavilion, and the flowing autumn water blend and reverberate, extending to the end of the distant sky.
I'm a lonely traveler walking along the road of life, following a wisp of beautiful flowers in the unique autumn night, holding on to the wheel tracks given to me by years, and moving forward leisurely.
I haven't fallen into such nostalgia for a long time, but those cheerful shadows are always lingering in my mind! Always reminiscing about the dreamy autumn night: the dead butterflies flying all over the sky are mixed with a touch of night rhyme, and they suddenly stand up and look for the flute, but they linger in this dreamy and confused night! Meet in the autumn night, in the beautiful melody created by God for us, you look back and smile, and complement each other with the clear spring of a spoonful of pool and themoon nine days away, like a dream immersed in a bubble, which makes people think of it and stand still! (4) Continuous thoughts by the sea At the moment when the plane took off, my mood was very complicated.
Because I always yearn for the sky, because someone told me that the blue of the sea is due to the background of the sky.
I sat by the window and glided over the clouds with the plane.
You can clearly see the trace left by the plane in the sky. I don't know whether it is pure white in blue or clear in white ... There is no flaw in the sky above the clouds, which is so complete and covered with continuous clouds.
Continuous clouds cluster into water, water gathers into rivers, and rivers merge into pieces of sea! Yes, it is the sea, it is an endless sea, it is a surging sea, and it can be vast, beautiful and gentle.
it looks big and magnificent.
It only makes people doubt, "Maybe I can float on the water in this sea, beautiful and moving".
The sea is white, set against the blue sky. What about the blue sea? The plane took me away from the endless sea, and I had to leave the flawless blue sky! The lingering thoughts of the seaside are soft and floating in my mind! (5) The waves come in a hurry and go quietly ... Once upon a time, I wandered on the soft beach, enjoying the clean touch and the kiss of the river wind.
I am disappointed, lying on the cobblestone, looking up at the blue sky, listening to the birds' gentle cries, throwing the small bluestone into the rapids with deep sadness, and making the splashing water decorate the wonderful dreams.
I sat quietly on the beach, watching the snow-white waves safely, calmly thinking about the true meaning of life and savoring the pure life like a dream.
The dreams and longings of watching in life are as crystal clear and fascinating as this spray.
it awakened my enthusiasm for sleeping for many years and activated my feelings, and I was delighted.
I am intoxicated in my little world, running forward and tightening back from time to time with the waves in front of me. Now, my thoughts are endless and my heart is full of inexplicable confusion. I really want to go to the river and listen to the guidance of the waves.
However, I can't find the old waves, and I can't find the charming beach. My eyes are at a loss ... What? These are easy to memorize ~ ~ ~ o (∩ _ ∩) o ~! ~ ~ ~ ~ My small production composition is 3 words
My small production My small production-How is the "tumbler" made? Let me tell you now! To make a tumbler, we must first prepare all the materials and tools for making a tumbler.
the best material is fresh eggshell, egg shell, duck egg shell, etc.
plasticine, eggshells, paper, scissors, gummed paper and colored pens should also be prepared.
when these materials are ready, you can make them.
Making a tumbler is carried out in the following steps: first, cut the paper into an oval shape with scissors; Second, draw clowns on oval paper; Third, uncover half of the eggshell, and put plasticine in it to fill the eggshell; Fourth, put the eggshell and the clown together with gummed paper.
in this way, a tumbler is done.
An ordinary eggshell can be turned into a beautiful tumbler.
In the process of making, we not only cultivate our hands-on ability, but also enrich our after-school life. What did you do for the first time? Composition 3 words
It was the first time that jiaozi was invited to eat jiaozi in our family, and this important task was given to me.
It's my first time to package jiaozi. After all, I'm very nervous, but I have always been confident, so I resolutely accepted this important task.
Bao jiaozi has to go to the vegetable market to buy raw materials first.
when I came to the food market, I felt that it was a sea of people.
I need to buy dumpling wrappers, leeks and pork.
buy leeks first, and I ran to the vegetable section, ah! There are watery vegetables everywhere, colorful and lovely! I looked around and finally found a food stall selling leeks.
I ran over and took a look. Well, the leeks are still fresh.
Many people are selling vegetables here, but the boss is busy, but his face is smiling.
I opened my voice and asked, "How much is a catty of leeks?" The boss replied with mirth: "1.
8 yuan.
”“1。
8 yuan, kid, I must give him a 1.
5。
"I have a small abacus in my heart.
“1。
how is 5 yuan? " I asked the boss.
The boss looked at me and said, "1.
5, no! " I was just about to go to other stalls to sell, when the boss said helplessly, "I didn't expect a child to bargain quite well."
5 yuan is 1.
5 yuan! " I happily gave the money to my boss and bought a catty. I chose the freshest leek.
next, I'm going to buy pork.
when I came to the meat market, I saw a lot of fresh meat.
There are fat ones, thin ones, chickens, ducks, mutton and beef, and all kinds of things are dazzling.
I saw a pork shop with many people buying it. Since there are so many people buying it, the pork in that shop must be very good! I trusted my own judgment and ran to have a look. Oh, this meat is really fresh: it is red, tender and oily.
I asked my boss how much a catty it was. "So many people came to buy it today, so I'll take 5.
5 sold! " He replied brightly.
compared with other shops, 5.
5 this price is really reasonable.
I bought a kilo.
finally, it's time to buy dumpling wrappers. I went to the noodle shop, where several uncles skillfully shook and rubbed the dough.
That technology is simply first-class. I bought 5 dumpling wrappers and spent 1 * * *.
2 yuan.
Alas, the food is finally finished. It's time to go home and pack jiaozi.
when I get home, I will wash the meat and vegetables and start chopping with two big kitchen knives.