How to visually measure soil moisture

Whether it's crops or the management of crops, we must observe soil moisture. Here is a simple measurement method - visual inspection. When observing, first select several representative points in the observation area, the depth is appropriate to 10 centimeters, then take out the sample soil, distinguish soil moisture levels, and determine the corresponding measures according to their specific conditions.
Soil moisture visual score can be divided into five levels
1. When the soil is squeezed by hand, there is water flowing out of the fingers and the mud splashes when it falls to the ground. It means that there is too much soil moisture and lack of oxygen. It is unfavorable to the growth of crops and should be drained and drained to prevent moisture damage.
2, with a clean knife inserted into the soil, immediately removed, soil stick on the knife; or put the mud on the back of the hand light pressure, will leave traces of mud, all that the soil is too wet, should clear the ditch drain.
3, with a knife inserted into the soil, soil is not sticky knife; hand soil is very easy to make a group, you can also rake into a 3 to 4 mm thick mud, that soil moisture is appropriate, favorable cultivation and crop growth.
4, can be hand-strength to earth pressure into pieces, but can also be twisted into pieces, indicating that less soil moisture, can still be cultivated, the crop can still grow normally.
5, soil is hard, hand pinch is not broken (clay), easy to loose (sand), said little soil moisture, clay is difficult to cultivate, it is easy to damage agricultural tools, crops drought, stems and leaves curling, irrigation and drought.

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