What are the ideal pH conditions for production of Soya beans in arid climates under irrigation?
Most data would indicate that ideal pH for soybeans to be in the range of 6.0 to 7.0. Values slightly lower than 6.0 may result in only minor reductions in yield, but if the levels get below 5.5, major impacts may be observed. On the upper end of the scale, there is little negative impact from pH levels to 7.2. The exception to that statement is that some herbicides will cause soybean injury at pH levels of 6.8 or higher. Once the pH level reaches 7.3 or higher, there is a possibility for the development of manganese or iron deficiency. Symptoms of the deficiency of the two elements are similar in the first stages, starting as chlorotic leaves with the veins staying green. As the deficiency develops, the leaves of the iron affected plants will turn white, and the leaves of the manganese deficient plants will become necrotic, take on the appearance of a rusty leaf.
