Friday, December 9, 2022
问题:将N、P、K称为“肥料三要素”是因为()。A、这三种元素常常供不应求B、土壤中这三种元素的供应量最少C、这三种元素的营养价值最大D、作物对这三种元素的需求量最大
Thursday, September 15, 2022
问题:果树枯顶病是缺什么元素。()A、CuB、MnC、ZnD、B
Thursday, September 15, 2022
Thursday, September 15, 2022
Friday, February 7, 2025
问题:下列宜施用氯的作物有:()A、棉花B、麻类作物C、小麦D、甜菜
Thursday, September 15, 2022
Sunday, January 21, 2024
Thursday, September 15, 2022
Monday, September 12, 2022
Thursday, May 30, 2024
Wednesday, March 5, 2025
问题:下列哪些属于肥害症状:()A、水稻叶片出现烟斑B、莴苣老叶呈表色C、马铃薯幼株呈赤黄色D、番茄呈金黄色
Tuesday, January 28, 2025
Monday, September 30, 2024
Tuesday, October 18, 2022
问题:下列肥料适宜做种肥施用的是()。A、尿素B、过磷酸钙C、磷矿粉D、磷酸二铵
Monday, September 12, 2022
Tuesday, October 29, 2024
Monday, September 12, 2022
问题:氮的营养功能是()。A、蛋白质的重要组分B、核酸和核蛋白的成分C、叶绿素的组分元素D、许多酶的组分
Thursday, September 15, 2022
问题:测土配方施肥的具体内容,包含着“()”、“()”和“()”三个程序。
Thursday, February 15, 2024
Tuesday, January 28, 2025