Normal leaf knowledge on soybean plant based on threshold

Abstract

Soybean plants have become commonly known by the people, especially farmers in Indonesia, how not in today's processed soybean plants vary widely. From the processed start in the form of nuts, processed soy essence, to a variety of other processed foods such as: tofu and tempeh. The high public interest and soybean variety variations so that soy can be regarded as a staple food that can be used as the primary food of some people, especially the Indonesian nation. One way to measure the growth of healthy soybean plants can be done with observations of leaf color changes. Where the function of the leaves is as a place of photosynthesis so as to produce a healthy seed and not easily attacked by pest disease. This study looked at leaves that lacked phosphorus (P) by comparing leaf color values to threshold